Rotary pump



March 24, 1953 w. HYRE 2,632,399

ROTARY PUMP Filed Oct. 30, 1947 4 Sheets-Sheet 1 F I6. I

54 a 55 3nnentor 6 9., WARREN. HYYRE,

March 24, 1953 w. HYRE 2,632,399

ROTARY PUMP Filed Oct. 50, 1947 4 Sheets-Sheet 2 I l V Snventdr l3WARREN HYRE,

4M A. attorney March 24, 1953 w, HYRE 2,632,399

ROTARY PUMP 4 Sheets-Sheet 3 Filed 001;. 30, 1947 Snventoi M (IttomgWARREN HYRE,- 3g

March 24, 1953 HYRE 2,632,399

ROTARY PUMP Filed Oct. 50, 1947 v 4 Sheets-Sheet 4 3nventor WARREN HYREGttorneg Patented Mar. 24, 1953 UNITED STATES PATENT OFFICE ROTARY PUMPWarren Hyre, Chattanooga, Tenn.

Application October 30, 1947, Serial No. 782,974

13 Claims. (01. 103-138) This invention relates to improvements in roypumps and has for a principal object the provision of an improvedpositive action, sliding vane type of rotary pump capable of effectivelypumping concrete, as well as other materials of a semi-fluid or viscousnature.

A rotary pump according to the invention is characterized by a two-partor sectional casing and the parts thereof may be axially separable andhingedly connected whereby the casing may be readily opened up to permitwashing out after each pour or run of the material being pumped, forexample, for inspection of casing and rotor parts, and for repair and/rreplacement of worn parts. The rotor is also preferably constructed intwo halves which are bolted together whereby it may be readilydisassembled for the purpose of repairing or replacing worn parts andthereupon reassembled with equal facility.

Another important feature of the invention is the provision of meanswhereby any material such as grout or sand working into the slide-waysprovided in the rotor for the sliding pistons or vanes thereof, or alongthe sides of the rotor or' vanes, is caused to pass harmlessly throughthe rotor or the casing end walls without damaging or causing undue wearof the casing and/or rotor parts. Simplified and readily replaceablewear and guide bushings for the moving parts of the rotor are employedthroughout and, as a further feature of the invention, expandingpackings effective against the faces of the sliding vane are providedfor the purpose of sealing the rotor slide-ways against substantialleakage of the material being pumped along the faces of the vanes.

The above and other features and objects of a rotary pump according tothe invention will appear from the following detailed description takenwith the accompanying drawings illustrating a physical embodiment of theinvention selected for the purpose of ready disclosure, it beingunderstood that the invention is not limited to the specific detailsshown, in which- Fig. 1 is a vertical section taken along line l| ofFig. 2, illustrating interior construction of a rotary pump for pumpingconcrete and like materials according to the invention;

Fig. 2 is a section taken generally along line 2-2 of Fig. 1, thesliding pistons or vanes being omitted to illustrate details of rotorconstruction and mounting;

Fig. 3 is a section taken along line 3-3 of Fig. 2;

Fig. 4 is a detail view looking into the periphery of the rotor at thend of a slide-way provided therein;

Fig. 5 is a section taken along line 55 of Fig. 4, illustrating apreferred mode of packing the vanes at the outer end of the slide-waysin which the vanes operate;

Figs. 6 and 7 are detail section views taken on lines 66 and 'l-'! ofFig. 1;

Figs. 8 and 9 are detail views illustrating th construction andintersecting relation of the sliding vanes operating in the rotoraforesaid;

and

Fig. 10 is an enlarged detail view of a specially constructed hingebetween casing parts which permits the pump casing to be readily openedup.

Referring to the drawings, reference character 8 (Figs. 1 and 2)generally designates a pump casing having an inlet 9 and an outlet [0.The casing may be of two-part construction, as shown, of which the partsH and I2 are preferably formed as castings which together are adapted toprovide a cylindrical pump chamber. Referring to Fig. 2, the casing partII is shown to be fixed to a stationary mounting plate 13, and thecasing part I2 is adapted to be bolted to the fixed casing part H bymeans of a plurality of spaced swing-bolts l4 hinged to lugs I5projecting exteriorly from the fixed casing part. The free ends of thebolts l4 are adapted, in the assembled position of the casing parts, topass into the bifurcations of correspondingly spaced lugs l6 projectingexteriorly from the casing part I 2, and to be secured by nuts I1.Accordingly, by unthreading said nuts and by removing key 25 to bedescribed, the movable casing [2 may be disconnected from fixed casingpart H for the purpose of opening up the casing.

Suitable means are provided to support the movable casing part l2 in itsopened-up position. Referring to Figs. 1, 2 and 10, such means prefer--ably include fixed hinge bars [9, 20 extending from the base of thefixed casing part II, each terminating in a narrow-width tongue 2|. Ahinge pin 22 connects each of the tongues with the forked end of aheaded shank 23 provided with a through opening 24 for the reception ofa locking key 25. As best seen in Fig. 10, movable casing part [2, uponunthreading of bolts l1 and removal of locking keys 25, may be pulledaxially outwardly from fixed casing part I I for the length of studs 23until it engages the heads'26 thereof which function as stops limitingaxial separation of the casing parts. Upon the casing part I2 engagingthe shank heads, its inner face clears the hinge joints between hingebar tongues 2| and studs 23, thus to permit the casing part [2 to beswung downwardly to its dotted-line position (Fig. 10). Since the hingeis capable of sup-'- porting the movable casing part i2 in itsdottedline position, the operator is relieved of any requirement ofholding the same in open position or of lowering it to a supportingsurface.

Referring to Fig. 2, the casing parts I I, I2 are provided in their endwalls with axially aligned hubs 21, 28 in which the pump rotor to bedescribed has bearing, the hubs being accordingly formed eccentric tothe casing axis. The end walls of each casing part are also providedwith a plurality of radial slots 29 (Fig. 3) opening to the casingexterior whose function will be described.

Contained within the casing and mounted to turn on an axis eccentric tothat of the pump chamber is a rotor generally designated 30. The rotormay be made in two half-sections, the halves 3|, 32 thereof beingrigidly although separably connected in face engagement by a pluralityof circumferentially spaced bolts 33, the heads 34 thereof and theirsecuring nuts 35 being accom m'odate'd in annular recesses formed in theinner faces of the end walls of the casing parts H, l2 as shown in .Fig.2. The aforesaid slots 29 connect with said end wall recesses.

"The'rotcr-halves are each formed with oppositely :extending trunnions35, 35 adapted to be supported in the casing hubs 2i, 2 8, the trunnionsturning in suitable sleeve bearings 31, 3711 contained in said hubs.Ring packings 38, 380. may be arranged between the inner radial faces ofthe hubs 2.1, 28 and the outer radial faces of the rotor halves andsegmental wear and packing rings 39, 3911. set into outer edge recessesformed in the rotor (Fig. 2) are effective between said outer edges andthe casing end walls. Oil holes M, Ma provide for lubricating saidbearings.

A drive shaft 42 driven from a suitable source of power such as anelectric motor (not shown) extends into the one trunnion 35 of rotorhalf 3| and drives the same and hence the rotor through a key 43. Itwill be observed that the drive shaft 42, rather than extending axiallythrough the rotor in the conventional manner, terminates at about theinner end of the trunnion 35 to'which it is drivingly connected. Sincethe rotor is bored for its full axial length, there results anopen-ended central passage 44 which extends axially through the rotorfrom the end of the drive shaft to the casing exterior.

Asseen in Fig. 1, the rotor is formed with intersecting, diametricalslide-ways 45, 56 which extend across and thus communicatewith the axialpassage 44 of the rotor. Intersecting, rightangularly disposed pistonsor vanes 41, 48 are mounted to slide in said slide-ways. By reference toFigs.8 and'9, the vanes may 'be of "the twosection construction shown,the sections 41a, 41b and 48a, 48b thereof being disposed in tandemrelation and urged outwardly of each other by pairs of springs tic, 480,respectively, coiled on spaced spring retaining legs 41d, 48d formed onthe adjacent ends of the vane sections as shown. Since the vanesintersect one another, the spring retaining legs of one pair of vanesections, such as the sections 47a, 41b of vane 47, are spaced apart buta small distance so that they may be accommodated in and move across thegreater space provided between the spring retaining legs of the.sections 48a, 48b of the other vane. Accordingly, the vanes mayoperateindependently of one another and without interference in their slidingmotion through the rotor. The action of the vane springs 41c, 48c is tocause the tip. edges of the vanes to engage against and follow the outerperipheral wall of the pump chamber as the rotor turns in the casing,the sections of each vane withdrawing and expanding relative to eachother during such rotation. As the width of the vanes at their outer ortip ends corresponds to that of the rotor and hence to the axial depthof the pump chamber, the material to be pumped entering inlet 9 of thepump chamber is propelled by the vanes to the pump chamber outlet illfrom whence it is discharged under positive pressure. Preferably, thevanes are tipped with rubber, neoprene or equivalent material wherebythey may effectively seal against the peripheral wall of the pumpchamber even though the material being handled incorporates coarseparticles such as sand, gravel and the like. The pump chamber may alsobe lined with rubber, thus to reduce wear both on its surface and on therubber tips of the vanes by the abrasive action of said coarseparticles, as well as to cause more easy movement of the vanes.

Instead of forming the vanes with tandemsections as shown, they may beformed by two-overlapping sections sliding on .one another. If thecasing is formed with an elliptical or substantially elliptical ratherthan circular chamber, the intersecting vanes maybe of one-piececonstruction. According to a further important feature .of theinvention, packing means effective :against the faces of the slidingvanes are provided .at the ends of the vane slide-ways. Referring-toFigs. 4 and 5, such packing means preferably takes the form of strips orblocks 5-0, 5| of expansible packing material such as rubber, feltor the.like extending the width of the vanes and being-compressed into tightpacking engagement with the opposite faces thereof .bymeansofcompressing screws 52, 53 threaded into the .outer end .faces ofbearing guides 54, 55 disposed in theslide-Ways inwardly of the packing.Said bearing guides may consist of blocks of bearing metal or of hardrubber, neoprene, fiber, felt or the like. It will be observed that thebearing guides and packing carried thereby are set into recessesprovided .adjacent the outer ends of the vane slide-Ways. As seen inFig. 5, the heads of the screws may seat on a metal strip 56 which isset. into each packing strip to extend substantially the length thereof.By tightening the screws 52, 53, the packing strips 50, 5i are caused toexpandinto tight engagement against the faces .of the vanes and toprovide an effective seal therefor.

To prevent the packing strips from expanding in endwise direction, eachstrip is confined between annular confining rings 51, .58., which are.secured against the outer side faces of the rotor by the bolts 33 whichsecure the rotor halves together. Said confining rings may carry pins-53which extend into corresponding holes provided in the outer side edgesof the "bearing guides 54, 55, the pins thus serving to anchor theguides and the confining rings preventing any endwise expansion thereofbeyond the end faces "of the the corrugations extending longitudinallyand communicating with the corrugations of the bearing guides 5 55. Asthe slide-ways open into the open-ended axial passage A l of the rotor,it will be observed that any sand or grout working by the outer vanepackings 55, 5! passes radially inwardly along the corrugations to therotor bore, from whence it passes harmlessly to the exterior of rotorand casing, As respects any material leaking past the side faces of therotor, such harmlessly discharges to the casing exterior through theslots 29 provided. in the end walls of the casing.

It is also within the purview of the invention to prevent leakage of thematerial being pumped past the vane packings 59, 5|, either by closingthe slots 29 or by initially constructing the easingend walls withoutsaid slots, and thereupon forcing water or other suitable liquid underpressure through the open end of the rotor bore and thence radiallyoutwardly through the slideways thereof, thereby water-sealing theslideways against entrance of sand, grout or like material through theouter ends of the slide-ways.

Without further analysis, it will be observed that a rotary pump asdescribed is designed for and particularly adapted to the pumping ofconcrete and like materials of a coarse or semi-fluid or viscous nature.The hinged connection between the casing parts permits the casing to beopened up in a simple operation for washing out after each pour or runof the material, for inspection and for repair or replacement of wornparts. As the pump is designed for the handling of semi-fluid materialswhich may incorporate relatively coarse particles, provision is made forsealing off the vane slide-Ways from any substantial leakage of thematerial into the slideways along both the faces and edges of the vanes.But in the event of such leakage, means are provided for effectingharmless passage of the material through the rotor or out of the casingend walls, so that undue Wear or damage to the moving parts of the rotoror to the rotor itself is precluded. Since the pump casing may readilybe opened up, all bearing and guide parts, which are themselves ofsimplified construction and of design permitting simple replacement, maybe easily replaced when worn.

As the invention is not confined to the specific details illustrated, itis intended that all matter contained in the above description or shownin. the accompanying drawings shall be interpreted as illustrative andnot in a limiting sense.

I claim:

1. In a rotary pump, a casing having peripheral inlet and outletpassages and providing a pump chamber and having end walls, a rotorprovided with a diametrical slide-way, a vane mounted to slide therein,a rotor driving shaft extending into the chamber through one end Wallonly of the casing and being drivingly connected to the rotor, the rotorhaving an axial passage opening through the other casing end wall, saidpassage being in communication with the slideway, and the faces of theslide-way on which the vane slides incorporating leak meanscommunieating with the axial passage, said leak means providing for thedischarge of any material being pumped which may leak into the slide-wayalong the face of the vane.

2. In a rotary pump, a casing having peripheral inlet and outletpassages and providing a pump chamber and having end walls provided withslots opening to the exterior of the casing,- a rotor having adiametrical slide-way, a vane mounted to slide therein, a rotor driveshaft drivingly connected to said rotor, said end wall slots providingfor the discharge of any material leaking past the edges of the vane orthe side faces of the rotor to the casing exterior.

3. In a rotary pump, a casing havingperipheral inlet and outlet passagesand providing a pump chamber and having end walls provided with amaterial discharge opening to the exterior of the casing, a rotorprovided with a diametrical slide-Way, a vane mounted to slide in saidway, the rotor having trunnions extending into aligned openings in thecasing end walls and being journaled for rotation in bearings mounted insaid openings, a rotor drive shaft having a drive connection with one ofthe rotor trunnions, the rotor and its other trunnion having an axialpassage communicating with the rotor slide-way and extendingto theexterior of the casing, and the faces of the slide-way on which the vaneslides being provided with radial passages communicating with the axialpassage, the construction and arrangement being such that any materialbein pumped which leaks past the edges of the vane and any such materialwhich leaks past the faces of the vane may discharge to casing exterior.

4. In a rotary pump, a casing having peripheral inlet and outletpassages and providing a pump chamber, a rotor having a diametricalslide-way and an axial passage intersecting said slide-way and extendingto casing exterior, a

vane mounted to slide therein, the walls of the slide-way on which thevane has sliding bearing being formed with means providing radialpassages for the radially inward movement to the axial passage of any ofthe material being pumped which may leak into the slide-way along theface of the vane.

5. In a rotary pump, a casin having peripheral inlet and outlet passagesand providing a pump chamber, a rotor operatively mounted in the chamberand having a diametrical slide-way and an axial passage communicatingwith said and extending to the casing exterior, a vane mounted to slidein the slide-way, the walls of the way on which the vane has bearingbeing formed with corrugations providing radial passages communicatingwith said axial passage and through which any of the material beingpumped which may leak past the faces of the vane is carried to theexterior of the casing.

6. In a rotary pump, a casing having peripheral inlet and outletpassages and providing a pump chamber, a rotor operatively mounted inthe chamber and having a diametrical slide-Way and an axial passagecommunicating with said way and extending to the casing exterior, a vanemounted to slide in the slide-way, oppositely di-sposed bearing guidesfor the vane seating in recesses provided in the opposite walls of theslideway adjacent its outer end, the faces of the guides adjacent thevane being provided with corrugations providing radial passagescommunicating with the axial passage and through which material leakingpast the vane may discharge to casing exterior.

7. In a rotary pump, a casing having peripheral inlet and outletpassages and providing a pump chamber, a rotor having a diametrical '7the siide way adjacent its: ends. and which, open through the'p'eripheryoi the. rotor, compressible packing material. adapted to seal against;vthe faces of the vane and being mounted in said recesses outwardly ofthe bearing guides, and means for compressing said packing materialagainst theouter end faces: of the bearing guides.

8. In. a rotary pump, a casing having peripherali-nlet and outletpassages and providing a pump chamber, a rotor operatively' mounted insaid chamber and having a diametrical. slide-way and an. axial. passagein: communication with the slide-way and extending to the casingexterior; a vane mounted to slide in the slideway, oppositely disposedbearing guides for the vane seating in: recesses prmd'ded in theopposi-teiwal'ls of. the slide-way adjacent its ends, the adjacent facesof the guides and walls of the slide-ways inwardly of the hearing guidesbeing provided with corrugations openings into said axial passage andproviding for the harmless passage through the rotor of. any materialbeing pumped which may leak into the slide-way along the facesof. thevane.

9; In a. rotary pump, a casing having peripheral; inlet. and outletpassages and providing a pump chamber, arotor operatively mounted insaid chamber and having a diametrical slide-way, a vane mounted to slidetherein, resilient packing mean-s extending the width of the vaneadapted to seal against the faces. of the vane and being positioned atthe outer ends of: the slide-Way so as to normally. prevent leakage ofthe material being pumped into the slide-way, means for compressing saidpacking means in radial inward direction. thereby :causing it to expandand seal against the faces of the vane, and means on the end tacos. ofthe rotor for confining the ends of the packing means against expansionin endwise. direction.v

10. A rotary pump as set forth in claim 9,. wherein the rotor isprovided with an axial passage to casing exterior, and wherein the facesof the slide-way on which. the valve slides are provided withcorrugations forming radial passages extending: between the packingmeans and the axial passage through which any of the. material being.pumped which leaks past the packing meansmay pass harmlessly to casingexterror.v

11.. In arotary' pump, a. casing having. periphera]; inlet: and outletpassages and providing a. pump chamber, a rotor operatively mounted insaid chamber andhaving. adiametrical slide-way,

8? a vanemountedgto slide therein, oppositely dis posed' hearing guidesfor the vane seating in recesses' provided in the opposite walls of theslide-- way adiacent'its ends, packing for saidv vane disposedthe outerends of said recess, means for compressing the packing against the outerend edges ofthe bearing guides thereby to expand the packing against thefaces of the vane, and packing con-fining means carried by the rotor forpreventing endwise expansion of. the packing.

12. In a. rotary pumpas set forth in claim 11, wherein the packingconfining means is also effective to locate and prevent endwise movementofthebearing guides;

13. A rotary pump as set forth in claim 11, wherein the rotor isprovided with an axial passage to casing exterior, and wherein the facesof the guides adjacent the vane and the walls of the slide-way inwardlyof said guides are provided with corrugations forming radial passagescommunicating with said. axial passage, whereby any of the materialbeing pumped which leaks past the packing may pass harmlessly to casing.exterior;

WARREN I-IYRE.

REFERENCES. CITED The follo wing references are of record in. thefi-leof this patent:

UNITED STATES PATENTS Number Name Date 628,989 Penn July 18, 1899693,470 Walker Feb. 18, 1902,. 1,042,951 Nielsen Oct. 29, 1912'1,111,160 Larsenet al Sept. 22, 1 914 1,127,668 Nielsen et a1. Feb. 9,1915' 1,366,138 Traud-t Jan. 18, 1921 1,672,257 Heitz June 5, 19281,974,112 Johnson Sept. 18, 1934. 2,035,465 Erskine et a1 Mar. 31, 1936'2,193,177 Laythorpe Mar. 12,1940 2,294,352 White Aug. 25, 1942 2,353,965Meador July 18,1944 2,367,326 'Beckman Jan. 16', 1945' 2,372,816Deschamps et a1. Apr. 3, I945- 2',462, 732 Dusevoir 'Feb. 22', I9492,514,521 Shaft July I1, 1950 FOREIGN PATENTS;

' Number Country Date 633,604 Denmark" May 28, 1945' 552,877 GreatBritain Apr. 28, 1943 684,149- France Mar; 11, 1930

